The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 20, 2024
Filed:
Nov. 23, 2021
Mitsubishi Chemical Corporation, Tokyo, JP;
Shingo Namiki, Tokyo, JP;
Yuuichi Hirami, Tokyo, JP;
Koji Nakamura, Tokyo, JP;
Hiroyuki Hayashi, Tokyo, JP;
Tomoko Maeda, Tokyo, JP;
Kenichi Satake, Tokyo, JP;
MITSUBISHI CHEMICAL CORPORATION, Tokyo, JP;
Abstract
A thermoplastic resin including a structural unit of formula (1): wherein Ato Aare each independently ═CH— or ═N—, and at least one of Ato Ais ═N—. Rto Rare each independently a hydrogen atom, an alkyl group, an aryl group, a heteroaryl group, or the like. At least two adjacent groups out of Rto Rare optionally bonded to each other to form a ring. Rand Rare each independently a direct bond or an optionally substituted alkylene group having 1 to 20 carbon atoms. X is an oxygen atom, a carbonyl group, or an optionally substituted amino group, and n is an integer of 1 to 5. A retardation film, a circularly polarizing plate containing the thermoplastic resin are disclosed.